Gallium(III) triflate-catalyzed one-pot selective synthesis of 2,3-dihydroquinazolin-4(1H)-ones and quinazolin-4(3H)-ones
作者:Jiuxi Chen、Dengze Wu、Fei He、Miaochang Liu、Huayue Wu、Jinchang Ding、Weike Su
DOI:10.1016/j.tetlet.2008.03.127
日期:2008.6
A series of 2,3-dihydroquinazolin-4(1H)-ones and quinazolin-4(3H)-ones have been synthesized in good to excellent yields and high selectivity by one-pot reaction using isatoic anhydride, ammonium acetate (or amines), and aldehydes in ethanol or in DMSO under mild conditions, respectively. The reaction was efficiently promoted by 1 mol % Ga(OTf)3 and the catalyst could be recovered easily after the
一系列的2,3-二氢喹唑啉-4(1 H)-和喹唑啉-4(3 H)-已通过使用等位酸酐,乙酸铵(或胺和乙醛分别在温和条件下的乙醇或DMSO中。通过1mol%的Ga(OTf)3有效地促进了反应,并且反应后催化剂可以容易地回收并重复使用而没有明显的反应性损失。